Geologists detected the high risk of a new eruption after evaluating an increased swarm of earthquakes around the island’s second largest volcano.

Pall Einarsson, a professor of geophysics at the University of Iceland, says the area around Bárdarbunga is showing signs of increased activity, which provides “good reason to worry”.

He told the country’s national TV station that a low number of seismometer measuring devices in the area is making it more difficult to determine the scale and likely outcome of the current shifts.

But he said there was “every reason to worry” as the sustained earthquake tremors to the north east of the remote volcano range are the strongest recorded in recent times and there was “no doubt” the lava was rising.

The geologist complained that the lack of coverage from measuring devices means he cannot accurately detect the depth and exact location of the increased number of localised earth movements.